C1217

CIRCUIT DESCRIPTION
The Electronic Brake Control Module/Electronic Brake Traction Control Module (EBCM/EBTCM) and the Brake Pressure Modulator Valve (BPMV) receive power from three circuits. CKT 642 supplies battery power to the pump motor. CKT 342 supplies ignition power to the solenoid valves, the EBCM/EBTCM, and the pump motor relay coil. CKT 641 supplies battery power to initialize controller operations. CKT 641 also supplies power to the solenoid valve relay coil.

CONDITIONS FOR SETTING THE DTC
The pump motor relay is commanded on and the pump relay voltage is less than 8.0 volts and ignition voltage is more than 10.5 volts

ACTION TAKEN WHEN THE DTC SETS
^ A DTC C1217 is stored
^ The ABS/TCS is disabled
^ The ABS and the TRACTION OFF indicators are turned on

CONDITIONS FOR CLEARING THE DTC
^ The condition for the Diagnostic Trouble Code (DTC) is no longer present and the scan tool Clear DTC function is used
^ 50 ignition cycles have passed with no DTCs detected

DIAGNOSTIC AIDS
^ Thoroughly inspect the wiring and the connectors. Failure to carefully and fully inspect the wiring and the connectors can result in misdiagnosis. Misdiagnosis may cause replacement of parts without repairing the malfunction.
^ The following conditions are possible causes of the malfunction:
- A problem in the power distribution system may result in no battery voltage to CKT 642
- The ABS MOTOR fuse is open
- CKT 642 has a wiring problem, corrosion, or faulty connections
- There is an internal malfunction in the EBCM/EBTCM or the BPMV
- The pump motor relay is faulty
- The relays are integral to the EBCM/EBTCM and are not serviceable
^ If an intermittent malfunction exists, refer to Troubleshooting Procedures.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
4. This step checks for a short to ground in CKT 642.
5. This step checks for an internal short in the BPMV.
8. This step checks for an open in CKT 642.